Stop motion



g- 1951 I A. A. ASTl LL ET AL 2,563,906

STOP MOTION Filed Jan, 8, 1948 INVENTORS. ALBERT A. ASTlLL. GEORGESFAMA.

%fi g/ W AT TORNEYS Patented Aug. 14, 1951 UNITED STATES PATENT OFFICESTOP MOTION Albert A. Astill and Georges Fama, Cumberland, Md,assig'nors to Celanese Corporation of America, a corporation of DelawareApplication January s, 1948, Serial No. 1,142

2 Claims. 1

This invention relates to textile machines wherein a plurality of yarnsare fed thereto in the form of a Warp, and relates more particularly toa mechanism employed in connection with said textile machines adapted toactuate an electrical warp stop motion upon breakage of a Warp yarn soas to halt the warp feed mechanism and the machine.

Warps of individual, parallel yarns, are nor mally subjected to a widevariety of treatments in the textile art. Thus, for example, a warp maybe sized, dyed or printed, or it may be fed to a knitting machine whereit is knitted into a fabric. For various causes, one or more of theyarns constituting the warp may fail while the warp is being fed to thetextile machine and it is exceedingly important that the warp feedmechanism and the machine be halted immediately upon such yarn breakageand the broken yarns tied since a defective warp will, of course,produce a defective fabric whether the warp is subsequently employed forknitting or for weaving operations.

It is therefore, an important object of this invention to provide anelectrically operated mechanism, including a circulating electrolyte,adapted to be employed in connection with the textile machines whereinyarn is fed thereto in the form of a warp, which is activated by thepresence of one or more broken warp yarns and which will act to halt thewarp feed drive means on breakage of a warp yarn and also the textilemachine receiving the yarn.

Other objects of this invention will appear from the following detaileddescription and the accompanying drawing.

In the drawing,

Fig. l is a fragmentary front-elevational view, partly in section, of mynovel mechanism showing a trough adapted to contain a liquid electrolyteand means for circulating the electrolyte; and

Fig. 2 is a fragmentary end view, in section, of a part of saidmechanism showing the path of the warp yarns relative thereto.

Like reference numerals indicate like parts throughout the drawing.

Referring now to the drawing, and more particularly to Fig. 2, a warp ofyarns indicated by reference numeral I is fed from a warp beam (notshown) in the direction indicated by the arrow and passes through a reed2 and then over a tension roll 3 to the desired textile operations.Above warp I and substantially coextensive therewith is a pipe 4containing air maintained under pressure. Pipe 4 is provided with aplurality of holes or slots 5 of relatively small diameter andsubstantially uniformly disposed along the underside thereof at closelyspaced intervals. Thus, the stream of air leaving each of holes 5constantly exerts a downward pressure upon the moving yarn warp I andtends to blow any broken yarn present in said moving warp out of theplane of the remaining unbroken yarns in a downward direction.

Extending across the full wid n of the warp I is a rectangular trough 5having an open pipe I set partly therein and extending across the fulllength of said trough 5. Parallel to and coextensive with pipe I is apair of electrically conducting wires 8 the ends of which are held inblocks 9, only one of which is shown, formed of a suitable insulatingmaterial. Wires 8 are part of a normally open electric circuit includingconnecting posts I0 and lead wires II which, when closed in a manner tobe described hereinafter in greater detail, activates a suitable circuitbreaker (not shown) in the warp feed drive circuit and in the machinedrive circuit thus halting the warp feed and the machine.

Open pipe I is adapted, normally to contain an aqueous or otherelectrolyte solution [2 stored in a reservoir I3 which is withdrawntherefrom through a pipe I4 and forced upward by a centrifugal pump I5through a regulating valve I6 which controls the rate of flow and thencethrough a feed line I1 into open pipe I, th rate of flow through pipe Ibeing regulated so there is a constant overflow therefrom, but not tocause flooding of trough 6. The overflow from pipe I cascades over theopen edges thereof and falls into trough 6 from which it is returned bygravity flow through pipe I8 to reservoir I3. Pump I5 is driven bypulley Ill rotated by any suitable means (not shown).

When a yarn in warp I breaks, the broken end is blown downwardly by thestream of compressed air directed on the warp I from pipe 4 and fallsacross open pipe I and wires 8. The cascading electrolyte solution I2pouring over the edges of open pipe I rapidly wets out the broken yarnand the wetted yarn in contact with each of said wires 8 closes theelectrical circuit, thus immediately stopping the warp feed drive, andany other drive means which may be operatively connected to the circuitbreaker thus activated.

As suitable electrolytes which may be employed in connection with thenovel mechanism of my invention there may be mentioned, for example, anaqueous solution of the dioctyl ester of sodium sulfosuccinic acid,sodium lauryl sulfate or sodium oleyl sulfate containing from about 0.5to 1% by weight of said salts.

It is to be understood that the foregoing detailed description is givenmerely by way of illustration and that many variations may be madetherein without departing from the spirit of our invention.

Having described our invention, what we desire to secure by LettersPatent is:

1. In a textile device for operating on a travelling warp of yarns,means for guiding said warp in a given path and means for stopping thefeed of said warp upon breakage of a yarn thereof, said latter meanscomprising an open vessel beneath and across the width of said warp,means for supplying to said open vessel electrolyte in such an amount asto maintain a constant overflow from said open vessel, electricallyconducting means forming part of a normally open electrical circuitadjacent to said open vessel and extending along the length thereof, andpneumatic means comprising air under pressure directed on said warp forforcing a broken end of yarn out of the plane of the warp, theconstruction and arrangement being such that the broken yarn falling onthe open vessel and the electrically conducting means adjacent theretois wetted by the electrolyte and closes the normally open electricalcircuit to stop the warp feed.

2. In a textile device for operating on a travelling warp of yarns,means for guiding said warp in a given path and means for stopping thefeed of said warp upon breakage of a yarn thereof,

said latter means comprising an open vessel beneath and across to widthof said warp, means for supplying to said open vessel electrolyte insuch an amount as to maintain a constant overflow from said open vessel,electrically conducting means comprising a pair of parallel wiresadjacent to and separated by said open vessel forming part of a normallyopen electrical circuit and extending along the length thereof, andpneumatic means comprising air under pressure directed on said warp forforcing a broken end of yarn out of the plane of the warp, theconstruction and arrangement being such that the broken yarn falling onthe open vessel and the electrically conducting means adjacent theretois wetted by the electrolyte and closes the normally open electricalcircuit to stop the warp feed.

ALBERT A. ASTILL. GEORGES FAMA.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,362,956 Grifiis Nov. 14, 19442,366,105 Hayes et al Dec. 26, 1944 2,371,110 Searles et a1 Mar. 6, 19452,438,365 Hepp et al. Mar. 23, 1948 Certificate of Correction Patent No.2,563,906 August 14, 1951 ALBERT A. ASTILL ET AL.

It is hereby certified that error appears in the printed specificationof the above numbered patent requirmg correction as follows:

Column 4, line 2, for to width read the width;

and that the said Letters Patent should be read as corrected above, sothat the same may conform to the record of the case in the PatentOffice.

Signed and sealed this 16th day of October, A. D. 1951.

THOMAS F. MURPHY,

Assistant Oommz'ssioner of Patents.

